- Joined
- Dec 8, 2015
- Messages
- 111
I have little experience with motorcycles. I purchased a little bike with a 125cc engine. The carburetor I bought needs to be spaced out to clear the cylinder fins. To do this, I purchased and used four cheap plastic carb spacers (or heat isolators.) They cracked after about a half hours time.
I want to machine a spacer/isolator about .800 thick, this goes between the carb and the manifold. I seen where one person had made an isolator from a hockey puck. I was thinking of doing that - or making one of aluminum. Does the hockey puck sound like a good idea? ( Better heat isolator, easy to machine and shape.} Or a more rigid aluminum one with a thin isolator?
Also, the current plastic ones have a O-Ring groove on the face and use an O-Ring to seal against the manifold. I don’t think this would be needed if a hockey puck were used. (Hockey Puck Durometer = 90). I can machine an O-Ring groove – but would a paper gasket not be just as good - even with aluminum? ? The phenolic isolators/spacers I looked at did not use an O-Ring. (I dont wish to machine phenolic. )
Does anyone have knowledge or advice on the best route to take? I machined a fixture today to help in milling - but undecided on material.
thanks
Jim
I want to machine a spacer/isolator about .800 thick, this goes between the carb and the manifold. I seen where one person had made an isolator from a hockey puck. I was thinking of doing that - or making one of aluminum. Does the hockey puck sound like a good idea? ( Better heat isolator, easy to machine and shape.} Or a more rigid aluminum one with a thin isolator?
Also, the current plastic ones have a O-Ring groove on the face and use an O-Ring to seal against the manifold. I don’t think this would be needed if a hockey puck were used. (Hockey Puck Durometer = 90). I can machine an O-Ring groove – but would a paper gasket not be just as good - even with aluminum? ? The phenolic isolators/spacers I looked at did not use an O-Ring. (I dont wish to machine phenolic. )
Does anyone have knowledge or advice on the best route to take? I machined a fixture today to help in milling - but undecided on material.
thanks
Jim